package nila;
import java.io.*;
import java.util.*;

public class I {
    public static void o(String v) {
        System.out.print(v);
    }
    public static void out(String v) {
        System.out.println(v);
    }
    public static void e(String v) {
        System.err.println("nila:"+v);
    }
    public static void d(String v) {
        System.err.println("debug:"+v);
    }
    public static void d(String p, String v) {
        System.err.println("\t" +p+":"+v);
    }

    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    public static String _gets(String p) {
        try {
            I.o(p);
            return br.readLine();
        } catch (Exception e) {
            return null;
        }
    }
    public static String i(String p) {
        return _gets(p);
    }
}

